# HW7 (Chapter 12, Problem 20) MA453, Fall 2008, Prof. Walther

- Any suggestions on how to solve this problem? I used the table found in Ch13, but I think there is more to this problem.

- --Akcooper 19:28, 22 October 2008 (UTC)

- From my understanding, this is the relationsihp I found:

- $ det M_2(Z) \neq 0 $